“实心的”的英语可以翻译为：stuffed，solid ...

铁棍是实心的, 而管子是空心的.A bar of iron is solid; a pipe is hollow.铁条是实心的, 管子是空心的.A iron bar is solid; a pipe is hollow.最早的汽车轮胎是实心的.The tires of the earliest cars were solid....